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# frozen_string_literal: true
# Finds the diff position in the new diff that corresponds to the same location
# specified by the provided position in the old diff.
module Gitlab
module Diff
class PositionTracer
attr_accessor :project
attr_accessor :old_diff_refs
attr_accessor :new_diff_refs
attr_accessor :paths
def initialize(project:, old_diff_refs:, new_diff_refs:, paths: nil)
@project = project
@old_diff_refs = old_diff_refs
@new_diff_refs = new_diff_refs
@paths = paths
end
def trace(old_position)
return unless old_diff_refs&.complete? && new_diff_refs&.complete?
return unless old_position.diff_refs == old_diff_refs
@ignore_whitespace_change = old_position.ignore_whitespace_change
strategy(old_position).new(self).trace(old_position)
end
def ac_diffs
@ac_diffs ||= compare(
old_diff_refs.base_sha || old_diff_refs.start_sha,
new_diff_refs.base_sha || new_diff_refs.start_sha,
straight: true
)
end
def bd_diffs
@bd_diffs ||= compare(old_diff_refs.head_sha, new_diff_refs.head_sha, straight: true)
end
def cd_diffs
@cd_diffs ||= compare(new_diff_refs.start_sha, new_diff_refs.head_sha)
end
def diff_file(position)
position.diff_file(project.repository)
end
private
def strategy(old_position)
if old_position.on_text?
LineStrategy
elsif old_position.on_file?
FileStrategy
else
ImageStrategy
end
end
def compare(start_sha, head_sha, straight: false)
compare = CompareService.new(project, head_sha).execute(project, start_sha, straight: straight)
compare.diffs(paths: paths, expanded: true, ignore_whitespace_change: @ignore_whitespace_change)
end
end
end
end
|
